Combustion apparatus and its ignition control method and readable storage medium

Abstract

This invention provides a combustion device, its ignition control method, and a readable storage medium. The ignition control method includes: acquiring a fan power-speed curve and the actual fan speed under constant airflow conditions, and obtaining a target fan power based on the curve and the actual fan speed; acquiring the actual fan power and actual temperature, and obtaining a fan compensation power based on the actual fan power and actual temperature; comparing the target fan power and the compensation power, and adjusting the fan speed when there is a deviation between the target power and the compensation power; and performing an ignition operation when the deviation between the target power and the compensation power is within a predetermined range. This method can improve the ignition success rate.

Description

Technical Field

[0001] This disclosure relates to the field of combustion equipment control, and more particularly to a combustion equipment, an ignition control method thereof, and a readable storage medium. Background Technology

[0002] Combustion equipment typically converts the chemical energy of fuel into heat energy by igniting it, thereby meeting domestic or industrial needs. Taking gas-fired water heaters as an example, they use combustible gases as fuel, such as natural gas, city gas, liquefied petroleum gas (LPG), and biogas, to provide heat to meet users' needs. A typical example is a gas water heater. When a gas water heater starts up, the gas proportional valve is adjusted to the appropriate opening to provide the gas required for combustion, the fan runs at the appropriate speed to provide the airflow needed for ignition, and the ignition device is triggered to ignite the gas-air mixture. However, in actual use, gas water heaters may be affected by factors such as back pressure caused by external headwinds, negative pressure caused by indoor sealing, or blockage of the flue, causing the airflow generated by the fan to be less than the optimal ignition airflow, thus affecting the ignition speed or even causing unsuccessful ignition, and ultimately reducing the user experience. Summary of the Invention

[0003] To overcome the problems existing in the related technologies, this disclosure provides a combustion device, an ignition control method thereon, and a readable storage medium.

[0004] A first aspect of this disclosure provides an ignition control method for a combustion device, wherein the combustion device includes an ignition apparatus and a fan; the ignition control method includes: acquiring a fan power-speed curve and the actual fan speed under constant airflow, and obtaining a target fan power based on the curve and the actual fan speed; acquiring the actual fan power and actual temperature, and obtaining a fan compensation power based on the actual fan power and actual temperature; comparing the target fan power and the compensation power, and adjusting the fan speed when there is a deviation between the target fan power and the compensation power; and performing an ignition operation when the deviation between the target fan power and the compensation power is within a predetermined range.

[0005] In some embodiments, when the target power of the fan is greater than the compensation power, the fan speed is increased; when the target power of the fan is less than the compensation power, the fan speed is decreased.

[0006] In some embodiments, the fan speed is adjusted according to the deviation between the target power and the compensation power of the fan; for example, the fan speed regulation ratio is determined according to the above deviation, and the fan speed is adjusted accordingly.

[0007] In some embodiments, the fan speed regulation ratio is proportional to the deviation between the fan's target power and the compensation power.

[0008] In other embodiments, when the deviation between the target power and the compensation power of the fan is within a predetermined range, it is further determined whether the change in the fan speed regulation ratio after a predetermined time interval is less than or equal to a predetermined threshold. If so, an ignition operation is performed.

[0009] In some embodiments, the fan compensation power is obtained by the following calculation formula: Pc = [100 + (Tn - Td)]% × C × Pa; where Pc is the fan compensation power, Pa is the actual fan power, Tn is the actual fan temperature, Td is the predetermined temperature, and C is the compensation coefficient.

[0010] A second aspect of this disclosure provides a combustion device comprising a burner for burning a mixture of gas and air to generate heat, a heat exchanger for heating water flowing through it using the heat generated by the burner, a gas valve for controlling the supply of gas to the burner, a fan for driving the gas flow, an ignition device for igniting the gas-air mixture, and a controller. The controller is configured to: acquire a fan power-speed curve and the actual fan speed under constant airflow, and obtain a target fan power based on the curve and the actual fan speed; acquire the actual fan power and actual temperature, and obtain a fan compensation power based on the actual fan power and actual temperature; compare the target fan power and the compensation power, and adjust the fan speed when there is a deviation between the target fan power and the compensation power; and control the ignition device to ignite when the deviation between the target fan power and the compensation power is within a predetermined range.

[0011] In some embodiments, the fan speed regulation ratio is determined based on the deviation between the fan's target power and the compensation power. When the fan's target power is greater than the compensation power, the fan speed is increased according to the aforementioned fan speed regulation ratio; when the fan's target power is less than the compensation power, the fan speed is decreased according to the aforementioned fan speed regulation ratio.

[0012] In some embodiments, when the deviation between the target power and the compensation power of the fan is within a predetermined range, it is further determined whether the change in the fan speed regulation ratio after a predetermined time interval is less than or equal to a predetermined threshold. If so, the ignition device is controlled to ignite.

[0013] In some embodiments, the fan compensation power is obtained by the following calculation formula: Pc = [100 + (Tn - Td)]% × C × Pa; where Pc is the fan compensation power, Pa is the actual fan power, Tn is the actual fan temperature, Td is the predetermined temperature, and C is the compensation coefficient.

[0014] A third aspect of this disclosure provides a computer-readable storage medium having instructions stored thereon that, when executed by a processor, implement the method described above.

[0015] The technical solutions provided by one or more embodiments of this disclosure may include the following beneficial effects: by comparing the target fan power obtained from the fan power-speed curve under equal airflow with the actual fan power after temperature compensation, and adjusting the fan speed accordingly when there is a deviation between the two, ignition is achieved when the deviation between the two is reduced and sufficiently close, that is, ignition occurs when the actual ignition airflow provided by the fan reaches or approaches the optimal ignition airflow, thereby improving the ignition success rate. Furthermore, by judging the changes in the fan speed regulation ratio, the ignition success rate can be further improved to avoid false ignition. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic block diagram of a combustion device connected to a hot water system in one embodiment of the present disclosure;

[0018] Figure 2 yes Figure 1 The flowchart shown illustrates the controller of the combustion device performing ignition control in one embodiment.

[0019] Figure 3 yes Figure 1 The flowchart shown illustrates the controller of the combustion device performing ignition control in another embodiment;

[0020] Figure 4 yes Figure 2 or Figure 3 This is a specific embodiment of the fan power-speed curve obtained under constant airflow in the ignition control process shown. Detailed Implementation

[0021] The embodiments shown will now be described in detail with reference to the accompanying drawings. However, these embodiments do not represent all embodiments consistent with this disclosure, and any structural, methodological, or functional modifications made by those skilled in the art based on these embodiments are included within the scope of protection claimed in the appended claims.

[0022] Combustion equipment typically uses fuels such as natural gas, oil, or coal to convert the chemical energy of the fuel into heat energy, thereby meeting domestic or industrial needs. Taking household gas-fired water heaters as an example, they use combustible gases as fuels, such as natural gas, city gas, liquefied petroleum gas, and biogas, to provide heat to meet users' needs. Examples include gas water heaters that provide domestic hot water, or dual-purpose gas boilers that can provide both domestic hot water and heating. The following will describe several embodiments of combustion heat standby ignition control in detail using gas water heaters as an example; however, those skilled in the art will clearly understand that combustion equipment is not limited to the gas water heaters illustrated.

[0023] like Figure 1 The hot water system shown in one embodiment of this disclosure includes a gas water heater 100 connected to a water outlet (such as a mixing valve faucet) 70 via a cold water pipe 51 and a hot water pipe 52. The pipes can be formed by connecting several water pipes to create a water flow path. There can be multiple water outlets, each connected to a cold water pipe and a hot water pipe. The gas water heater 100 includes a housing 10, a burner assembly, a heat exchanger 13, and a flue gas exhaust device 14 housed within the housing 10. The housing 10 can be assembled from several panels to form a receiving space to accommodate the various components. An inlet pipe 111, an outlet pipe 112, and a gas supply pipe 113 extend from the bottom of the housing 10. The inlet pipe 111 is connected to the cold water pipe 51, and the outlet pipe 112 is connected to the hot water pipe 52.

[0024] The burner assembly typically includes a gas distributor (not shown) and a burner 12. A gas valve 15 is provided on the gas supply line 113. This gas valve 15 may be an electrically controllable valve for connecting or disconnecting the gas supply passage and controlling the amount of gas supplied to the gas distributor and ultimately to the burner 12. In some embodiments, the burner 12 includes a plurality of combustion units arranged side by side along a longitudinal direction. Each combustion unit is flat and plate-shaped, typically vertically fixed in the burner frame, with an air inlet at the bottom, a plurality of flame holes at the top, and a gas-air mixing passage connecting the air inlet and the flame holes. Gas supplied via the gas valve 15 enters the air inlet of each combustion unit through the gas distributor, mixes with simultaneously entering primary air in the gas-air mixing passage, and is delivered to the flame holes located at the top of the burner plate for combustion to generate hot flue gas. The burner assembly also includes an ignition device 121 for igniting the gas-air mixture and a flame detection device 122 for detecting the presence of a flame. In some embodiments, the ignition device 121 includes a pair of ignition electrodes extending above the flame port of the combustion unit. The flame detection device 122 includes a flame detection electrode extending above the flame port of the combustion unit.

[0025] The heat generated by combustion in burner 12 passes through heat exchanger 13. Heat exchanger 13 is typically positioned above burner 12. In some embodiments, the heat exchanger may be a finned tube heat exchanger, wherein multiple fins are provided within the heat exchanger housing, and a heat exchange water pipe meanders through these fins, with its two ends connected to an inlet pipe 111 located upstream in the water flow direction and an outlet pipe 112 located downstream in the water flow direction, respectively. The heat generated by combustion of the gas-air mixture is absorbed by the fins and further transferred to the water flowing through the heat exchange water pipe. The heated water is then transferred to the hot water pipeline through outlet pipe 112, thereby providing users with domestic hot water for drinking, bathing, and other purposes.

[0026] In some embodiments, a fan 16 is disposed below the burner 12 to drive gas flow, thereby providing the air required for combustion and causing the flue gas generated by combustion to be collected by the smoke hood of the smoke exhaust device 14, and then discharged through a smoke exhaust pipe (not shown) connected to the smoke hood. A water outlet temperature sensor 181 is disposed at the water outlet pipe 112 (e.g., on the outer wall of the water outlet pipe) to detect the temperature of the hot water output through the water outlet pipe. The temperature sensor can be a thermistor, such as a positive temperature coefficient thermistor (PTC). In some embodiments, the temperature sensor can also be a negative temperature coefficient (NTC) temperature sensor. A flow sensor 182 is disposed in the water path to detect the water flow rate. In some embodiments, the flow sensor can be installed at the water inlet pipe 111 to detect the inlet water flow rate. It can include a rotor assembly with a magnet and a Hall element. When water flows through the detection device 182, the rotor assembly is rotated, thereby utilizing the Hall effect of the Hall element to measure magnetic physical quantities.

[0027] The controller 17 is housed within the housing 10 for detecting and controlling the operation of various circuit components within the gas-fired water heater. In some embodiments, the controller 17 may be a control circuit comprising a processor, a memory, and several electronic components connected in a specific wiring configuration. The processor may be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor. In this embodiment, the processor is the control center of the gas-fired water heater, connecting various parts of the device via various interfaces and lines. For example, the controller 17 is wired or wirelessly connected to the ignition device 121, flame detection device 122, gas valve 15, fan 16, outlet water temperature sensor 181, and flow sensor 182.

[0028] The memory can be used to store instructions for any application or method operating on the processor, as well as various types of data. The processor implements the various functions of the gas-fired water heater by running or executing programs or instructions stored in the memory and by calling data stored in the memory. The memory can contain any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (PROM), magnetic storage, flash memory, solid-state memory, magnetic disks, or optical disks, etc.

[0029] The following combinations Figure 2 The flowchart shown illustrates the steps of a method in which the processor in controller 17 executes stored programs or instructions to implement ignition control in one embodiment.

[0030] When a user needs hot water, they turn on the hot water tap. At this time, the flow sensor 182 detects fluctuations in the water flow. The controller 17, by collecting the signal from the flow sensor 182's operating status, can identify the hot water demand, meaning it needs to control the ignition device 121 to ignite the gas-air mixture and generate heat to heat the cold water flowing into the equipment before outputting it (step 301). A tachometer can receive pulse signals from sensors installed on the fan and send them to the controller 17. The controller 17 reads this signal and calculates the actual fan speed using software (step 302). The controller 17 retrieves pre-stored fan power-speed curves at constant airflow from its memory. Figure 4 The illustration shows a specific embodiment of the fan power-speed curve under constant airflow. This curve is the fan power-speed curve measured at a predetermined temperature (e.g., 20°C) and the same ignition airflow (e.g., optimal ignition airflow). During the prior measurement process, corresponding fan power is measured using several pre-given fan speeds, thereby... Figure 4 The corresponding data points are plotted in the coordinate graph shown, and the above-mentioned fan power-speed curve equation is obtained by interpolation. After obtaining the fan power-speed curve and the actual fan speed under the same air volume, the controller 17 obtains the fan target power based on the curve and the actual fan speed (step 303).

[0031] The controller 17 can calculate the actual power of the fan by acquiring the current and voltage of the fan 16, and can also acquire the actual temperature of the fan through a pre-set temperature sensor. Since the target power of the fan obtained from the aforementioned fan power-speed curve is obtained at a specific temperature (e.g., 20°C), and the actual temperature of the fan may deviate from this specific temperature, it is necessary to first compensate the actual power of the fan to obtain the equivalent power corresponding to the aforementioned specific temperature. The controller 17 can obtain the temperature-compensated fan power based on the actual power and actual temperature of the fan (step 304). In some embodiments, the fan compensation power can be obtained by the following calculation formula: Pc = [100 + (Tn - Td)]% × C × Pa; where Pc is the fan compensation power, Pa is the actual power of the fan, Tn is the actual temperature of the fan, Td is the predetermined temperature (e.g., 20°C), and C is the compensation coefficient. The compensation coefficient C can be a predetermined fixed value, or it can be determined according to a function related to the number of ignitions.

[0032] The target power and compensation power of the fan 16 are compared (step 305). When there is a deviation between the target power and the compensation power, the fan speed is adjusted so that the actual ignition air volume provided by the fan operation can reach or approach the optimal ignition air volume. The deviation between the target power and the compensation power can be the difference between the two, or it can be a percentage value obtained according to the formula "|target power - compensation power| / target power". In some embodiments, when the target power of the fan is greater than the compensation power (step 306), the fan speed is increased (step 307); when the target power of the fan is less than the compensation power, the fan speed is decreased (step 308). The controller 17 can adjust the fan speed according to the deviation between the target power and the compensation power. Specifically, the controller 17 determines the fan speed regulation ratio according to the deviation between the target power and the compensation power, and adjusts the fan speed accordingly. In some embodiments, the fan speed regulation ratio is proportional to the deviation between the target power and the compensation power of the fan. For example, when the target power of the fan is greater than the compensation power, assuming the deviation between the target power and the compensation power is a percentage, such as 10%, i.e., (target power - compensation power) / target power = 10%, then the fan speed regulation (speed increase) ratio is determined to be 10% × k, where k is a constant. For ease of description, assume k = 1, then the fan speed regulation ratio is 10%. After a certain time interval, such as 1 second, if the deviation between the fan's target power and the compensation power is again found to be 7%, then the fan speed regulation (speed increase) ratio is determined to be 7%, thus continuing the speed increase of 7% on the basis of the previous 10% increase, that is, a 17% increase in fan speed compared to the original.

[0033] The controller 17 also determines whether the deviation between the target power and the compensation power of the fan is within a predetermined range (step 309). If so, the controller 17 controls the ignition device 121 to ignite (step 310). The deviation between the target power and the compensation power of the fan can be initially within the predetermined range, or it can be that the deviation between the target power and the compensation power gradually converges as the fan speed is adjusted, causing the deviation to enter the predetermined range. In some embodiments, the deviation between the target power and the compensation power of the fan can be the difference between the two, and the predetermined range can be [0, X], such as X = 20, that is, 0 ≤ deviation between target power and compensation power ≤ 20; in other embodiments, the deviation between the target power and the compensation power of the fan can be a percentage value obtained according to the formula "|target power - compensation power| / target power", and the predetermined range can be [0, X%], such as X = 1, that is, 0 ≤ deviation between target power and compensation power ≤ 1%. Therefore, by comparing the target fan power obtained from the fan power-speed curve under the same air volume with the actual fan power after temperature compensation, and adjusting the fan speed accordingly when there is a deviation between the two, ignition is achieved when the deviation between the two is reduced and sufficiently close, that is, when the actual ignition air volume provided by the fan operation reaches or approaches the optimal ignition air volume, thereby improving the ignition success rate.

[0034] The following combinations Figure 3 The flowchart shown illustrates the steps of a method in another embodiment where the processor in controller 17 executes stored programs or instructions to implement ignition control.

[0035] and Figure 2 Similar to the illustrated embodiment, after recognizing the ignition requirement (step 401), the controller 17 acquires the actual fan speed (step 402) and the fan power-speed curve under equal airflow, and obtains the target fan power accordingly (step 403). The controller 17 also acquires the actual fan power and actual temperature, and obtains the temperature-compensated fan power accordingly (step 404). The controller 17 compares the target power and the compensated power of the fan (step 405), and determines whether the target power is greater than the compensated power (step 406); if the target power is greater than the compensated power, the fan speed is increased (step 407); if the target power is less than the compensated power, the fan speed is decreased (step 408). The controller 17 can adjust the fan speed according to the deviation between the target power and the compensated power. Specifically, the controller 17 determines the fan speed regulation ratio according to the deviation between the target power and the compensated power, and adjusts the fan speed accordingly. In some embodiments, the fan speed regulation ratio is proportional to the deviation between the target power and the compensated power of the fan.

[0036] The controller 17 also determines whether the deviation between the target power and the compensation power of the fan is within a predetermined range (step 409). In some embodiments, the deviation between the target power and the compensation power of the fan can be the difference between the two, and the predetermined range can be [0, X], such as X = 20, that is, 0 ≤ deviation between target power and compensation power ≤ 20; in other embodiments, the deviation between the target power and the compensation power of the fan can be a percentage value obtained according to the formula "|target power - compensation power| / target power", and the predetermined range can be [0, X%], such as X = 1, that is, 0 ≤ deviation between target power and compensation power ≤ 1%. When the deviation between the target power and the compensation power of the fan is within the predetermined range, it indicates that the actual ignition air volume provided by the fan operation may have reached or approached the optimal ignition air volume. However, in some embodiments, the above-mentioned power deviation may be within the predetermined range, but the speed regulation ratio of the fan is still increasing significantly, that is, the actual ignition air volume provided by the fan has not approached the optimal ignition air volume. Therefore, the controller 17 further determines whether the change in the fan speed regulation ratio after a predetermined time interval is less than or equal to a predetermined threshold (step 410). If yes, the ignition operation is performed (step 411); otherwise, the process returns to step 405. For example, assuming the predetermined time interval is 2 seconds and the predetermined threshold for the change in the fan speed regulation ratio is 3%. If the controller 17 determines the first fan speed regulation ratio to be 10% based on the deviation between the current target power and the compensation power of the fan, then for the next second, the fan will operate at 110% of its original speed. After 1 second, the controller 17 determines the second fan speed regulation ratio to be 7% based on the deviation between the current target power and the compensation power of the fan, then for the next second, the fan will operate at 117% of its original speed. In other words, after the predetermined time interval (i.e., 2 seconds), the fan speed regulation ratio increases by 17%, which is 17% in this embodiment. This is obviously greater than the predetermined threshold of 3%. Therefore, even if the deviation between the target power and the compensation power of the fan is within the predetermined range at this time, the controller will still not perform the ignition operation. Therefore, by judging the changes in the fan speed regulation ratio, the success rate of ignition can be further improved, so as to avoid false ignition.

[0037] All or part of the steps in the methods of the above-disclosed embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a computer-readable storage medium, and when executed by a processor, it can implement the steps of the various method embodiments described above. The computer program includes computer program code, which can be in the form of source code, object code, executable files, or some intermediate form. The readable storage medium can contain any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (PROM), magnetic storage, flash memory, solid-state memory, magnetic disk, or optical disk, etc.

[0038] It should be understood that the methods and apparatus disclosed above can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative. The division of units in the controller is only a logical functional division; in actual implementation, there may be other division methods. For example, multiple units may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the connections between the components, parts, and units discussed above can be electrical, mechanical, or other forms of connection; they can be direct connections or indirect connections through interfaces, etc.; they can be wired connections or wireless connections.

[0039] Furthermore, the units described above as separate components may or may not be physically separate, and the components shown as units may or may not be physical units; some or all of the units can be selected to achieve the purpose of the disclosed embodiments according to actual needs. Additionally, the functional units in the above embodiments can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated units described above can be implemented in hardware or in a combination of hardware and software functional units.

[0040] It should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An ignition control method for a combustion device, the combustion device comprising an ignition device and a fan; characterized in that, The method includes: Obtain the fan power-speed curve and the actual fan speed under the same air volume, and obtain the target fan power based on the curve and the actual fan speed; Obtain the actual power and actual temperature of the fan, and obtain the fan compensation power based on the actual power and actual temperature; Compare the target power and the compensation power of the fan, and adjust the fan speed when there is a deviation between the target power and the compensation power. When the deviation between the target power and the compensation power of the fan is within the predetermined range, the ignition operation is performed.

2. The ignition control method for the combustion device according to claim 1, characterized in that: The step of adjusting the fan speed when there is a deviation between the target power and the compensation power of the fan includes: increasing the fan speed when the target power of the fan is greater than the compensation power; and decreasing the fan speed when the target power of the fan is less than the compensation power.

3. The ignition control method for the combustion device according to claim 1, characterized in that: The step of adjusting the fan speed when there is a deviation between the target power and the compensation power of the fan includes adjusting the fan speed according to the deviation between the target power and the compensation power of the fan.

4. The ignition control method for the combustion device according to claim 3, characterized in that: The step of adjusting the fan speed based on the deviation between the target power and the compensation power of the fan includes determining the fan speed regulation ratio based on the deviation and adjusting the fan speed accordingly.

5. The ignition control method for a combustion device according to claim 4, characterized in that: The speed regulation ratio of the fan is proportional to the deviation between the target power and the compensation power of the fan.

6. The ignition control method for a combustion device according to claim 4, characterized in that: When the deviation between the target power and the compensation power of the fan is within a predetermined range, it is further determined whether the change in the fan speed regulation ratio after a predetermined time interval is less than or equal to a predetermined threshold. If so, the ignition operation is performed.

7. The ignition control method for a combustion device according to claim 1, characterized in that: The fan compensation power is obtained by the following calculation formula: Pc = [100 + (Tn - Td)]% × C × Pa; where Pc is the fan compensation power, Pa is the actual fan power, Tn is the actual fan temperature, Td is the predetermined temperature, and C is the compensation coefficient.

8. A combustion apparatus comprising a burner for burning a mixture of fuel gas and air to generate heat, a heat exchanger for heating water flowing through it using the heat generated by the burner, a gas valve for controlling the supply of fuel gas to the burner, a fan for driving the gas flow, an ignition device for igniting the fuel gas and air mixture, and a controller; characterized in that, The controller is configured to, Obtain the fan power-speed curve and the actual fan speed under the same air volume, and obtain the target fan power based on the curve and the actual fan speed; Obtain the actual power and actual temperature of the fan, and obtain the fan compensation power based on the actual power and actual temperature; Compare the target power and the compensation power of the fan, and adjust the fan speed when there is a deviation between the target power and the compensation power. When the deviation between the target power and the compensation power of the fan is within a predetermined range, the ignition device is controlled to ignite.

9. The combustion device according to claim 8, characterized in that: The control of adjusting the fan speed when there is a deviation between the target power and the compensation power of the fan includes determining the fan speed regulation ratio based on the deviation between the target power and the compensation power of the fan; when the target power of the fan is greater than the compensation power, increasing the fan speed according to the fan speed regulation ratio; and when the target power of the fan is less than the compensation power, decreasing the fan speed according to the fan speed regulation ratio.

10. The combustion device according to claim 9, characterized in that: When the deviation between the target power and the compensation power of the fan is within a predetermined range, it is further determined whether the change in the fan speed regulation ratio after a predetermined time interval is less than or equal to a predetermined threshold. If so, the ignition device is controlled to ignite.

11. The combustion device according to claim 8, characterized in that: The fan compensation power is obtained by the following calculation formula: Pc = [100 + (Tn - Td)]% × C × Pa; where Pc is the fan compensation power, Pa is the actual fan power, Tn is the actual fan temperature, Td is the predetermined temperature, and C is the compensation coefficient.

12. A computer-readable storage medium having instructions stored thereon, characterized in that: When the instructions are executed by the processor, they implement the method as described in any one of claims 1-7.

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